Method of preparing iron oxide nanoparticles

Abstract

Provided are a method of preparing iron oxide nanoparticles, iron oxide nanoparticles prepared thereby, and an anode material including the iron oxide nanoparticles.

What is claimed is: 
     
       1. A method of preparing oval shaped iron (III) oxide nanoparticles, the method comprising:
 preparing a ferric chloride (FeCl 3 ) aqueous solution; 
 preparing a sodium hydroxide (NaOH) aqueous solution; 
 obtaining a mixed aqueous solution consisting of the ferric chloride (FeCl 3 ) aqueous solution, the sodium hydroxide (NaOH) aqueous solution, and a sodium sulfate (Na 2 SO 4 ) aqueous solution; 
 reacting the mixed aqueous solution in an electric convection oven in a temperature range of 100° C. to 105° C. for 90 hours to 100 hours at atmospheric pressure to get a solid product; and 
 cooling, washing, and drying the solid product to get a dried product, 
 wherein a concentration of the FeCl 3  aqueous solution is in a range of 2 M to 3 M, 
 a concentration of the NaOH aqueous solution is in a range of 5 M to 6 M, 
 a concentration of the Na 2 SO 4  aqueous solution is in a range of 0.5 M to 1 M, and 
 the dried product consists of iron (III) oxide. 
 
     
     
       2. The method of  claim 1 , wherein a volume ratio of the ferric chloride aqueous solution:the sodium hydroxide aqueous solution:the sodium sulfate aqueous solution is 10:9:x,
 where x satisfies 0<x<1.